dom/camera/GonkCameraManager.cpp
author Mike Hommey <mh+mozilla@glandium.org>
Sat, 23 Jan 2016 11:40:24 -0800
changeset 281396 1378b39a9085890ce142e6933ebd50b6537f4ec5
parent 268184 e8c7dfe727cd970e2c3294934e2927b14143c205
permissions -rw-r--r--
Bug 1242074 - Avoid going back and forth between FasterMake and RecursiveMake; r=gps FasterMake needs some RecursiveMake install manifests to have been processed before doing its work, so we can actually end up processing them twice because of the going back and forth from FasterMake in the hybrid build system. Set the dependency at the RecursiveMake level when doing an hybrid build.

/*
 * Copyright (C) 2012-2014 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "ICameraControl.h"
#include "CameraCommon.h"
#include "GonkCameraControl.h"
#include "CameraPreferences.h"
#include "TestGonkCameraControl.h"

#ifdef MOZ_WIDGET_GONK
#include <camera/Camera.h>
#else
#include "FallbackCameraPlatform.h"
#endif

using namespace mozilla;

// From ICameraControl, gonk-specific management functions
nsresult
ICameraControl::GetNumberOfCameras(int32_t& aDeviceCount)
{
  aDeviceCount = android::Camera::getNumberOfCameras();
  return NS_OK;
}

nsresult
ICameraControl::GetCameraName(uint32_t aDeviceNum, nsCString& aDeviceName)
{
  int32_t count = android::Camera::getNumberOfCameras();
  int32_t deviceNum = static_cast<int32_t>(aDeviceNum);

  DOM_CAMERA_LOGI("GetCameraName : getNumberOfCameras() returned %d\n", count);
  if (deviceNum < 0 || deviceNum > count) {
    DOM_CAMERA_LOGE("GetCameraName : invalid device number (%u)\n", aDeviceNum);
    return NS_ERROR_INVALID_ARG;
  }

  android::CameraInfo info;
  int rv = android::Camera::getCameraInfo(deviceNum, &info);
  if (rv != 0) {
    DOM_CAMERA_LOGE("GetCameraName : get_camera_info(%d) failed: %d\n", deviceNum, rv);
    return NS_ERROR_NOT_AVAILABLE;
  }

  switch (info.facing) {
    case CAMERA_FACING_BACK:
      aDeviceName.AssignLiteral("back");
      break;

    case CAMERA_FACING_FRONT:
      aDeviceName.AssignLiteral("front");
      break;

    default:
      aDeviceName.AssignLiteral("extra-camera-");
      aDeviceName.AppendInt(deviceNum);
      break;
  }
  return NS_OK;
}

nsresult
ICameraControl::GetListOfCameras(nsTArray<nsString>& aList)
{
  int32_t count = android::Camera::getNumberOfCameras();
  DOM_CAMERA_LOGI("getListOfCameras : getNumberOfCameras() returned %d\n", count);
  if (count <= 0) {
    aList.Clear();
    return NS_OK;
  }

  // Allocate 2 extra slots to reserve space for 'front' and 'back' cameras
  // at the front of the array--we will collapse any empty slots below.
  aList.SetLength(2);
  uint32_t extraIdx = 2;
  bool gotFront = false;
  bool gotBack = false;
  while (count--) {
    nsCString cameraName;
    nsresult result = GetCameraName(count, cameraName);
    if (result != NS_OK) {
      continue;
    }

    // The first camera we find named 'back' gets slot 0; and the first
    // we find named 'front' gets slot 1.  All others appear after these.
    if (cameraName.EqualsLiteral("back")) {
      CopyUTF8toUTF16(cameraName, aList[0]);
      gotBack = true;
    } else if (cameraName.EqualsLiteral("front")) {
      CopyUTF8toUTF16(cameraName, aList[1]);
      gotFront = true;
    } else {
      CopyUTF8toUTF16(cameraName, *aList.InsertElementAt(extraIdx));
      extraIdx++;
    }
  }

  if (!gotFront) {
    aList.RemoveElementAt(1);
  }

  if (!gotBack) {
    aList.RemoveElementAt(0);
  }

  return NS_OK;
}

// implementation-specific camera factory
already_AddRefed<ICameraControl>
ICameraControl::Create(uint32_t aCameraId)
{
  nsCString test;
  CameraPreferences::GetPref("camera.control.test.enabled", test);
  RefPtr<nsGonkCameraControl> control;
  if (test.EqualsASCII("control")) {
    NS_WARNING("Using test CameraControl layer");
    control = new TestGonkCameraControl(aCameraId);
  } else {
    control = new nsGonkCameraControl(aCameraId);
  }
  return control.forget();
}